<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<div id="app">
    <h1>当前技术: {{counter}}</h1>
    <!--<button v-on:click="counter++">+</button>
    <button v-on:click="counter&#45;&#45;">-</button>-->
    <button v-on:click="increment">+</button>
    <button @click="sub">-</button>
</div>

<script src="../js/vue%20.js"></script>
<script>
    const app = new Vue({
        el: '#app',
        data:{
            counter: 0
        },
        methods:{
            increment: function (){
                console.log('increment被执行');
                this.counter++
            },
            sub: function (){
                console.log('sub被执行');
                this.counter--
            }
        }
    })
</script>

</body>
</html>